Correction :

16 - 3 = 13	21 - 9 = 12
9 + 6 = 15	48 - 24 = 24
10 + 23 = 33	16 + 3 = 19
23 - 14 = 9	15 - 3 = 12
24 + 9 = 33	21 : 3 = 7
21 + 11 = 32	8 + 7 = 15
7 × 10 = 70	9 - 5 = 4
32 - 17 = 15	38 - 14 = 24
18 - 6 = 12	6 - 6 = 0
24 - 5 = 19	6 × 1 = 6